Photographing lens assembly, image capturing unit and electronic device

ABSTRACT

A photographing lens assembly includes, in order from an object side to an image side: a first, a second, a third, a fourth, a fifth and a sixth lens elements. The first lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, wherein the object-side surface has at least one convex critical point in an off-axis region thereof. The third lens element has an image-side surface being convex in a paraxial region thereof. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, and an image-side surface being convex in a paraxial region thereof. The sixth lens element has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface has at least one convex critical point in an off-axis region thereof.

RELATED APPLICATIONS

This application claims priority under 35 U.S.C. § 119 to TaiwanApplication 106112689, filed Apr. 14, 2017, which is incorporated byreference herein in its entirety.

BACKGROUND Technical Field

The present disclosure relates to a photographing lens assembly, animage capturing unit and an electronic device, more particularly to aphotographing lens assembly and an image capturing unit applicable to anelectronic device.

Description of Related Art

In recent years, with the popularity of electronic devices having camerafunctionalities, the demand for miniaturized optical systems has beenincreasing. As advanced semiconductor manufacturing technologies havereduced the pixel size of image sensors, and compact optical systemshave gradually evolved toward the field of higher megapixels, there isan increasing demand for compact optical systems featuring better imagequality.

With the development of the miniaturized optical systems, electronicdevices equipped with the optical systems, such as smartphones, drivingrecorders, image recognition systems, video game consoles and smart homedevices, are the trend of future technologies. Also, in order to obtainuser experiences in a broader range of applications, smart electronicdevices equipped with one, two, even three lenses, which have differentfields of view, have become the mainstream on the market. Accordingly,imaging lenses with different features are provided for variousapplications; in addition, the need for optical systems with large angleof view is now higher than ever, and the product specifications arebecoming more demanding as well.

However, a first lens element (i.e., the lens element closest to theimaged object) in a conventional lens assembly with a wide view angleconfiguration usually has negative refractive power, an object-sidesurface being convex in a paraxial region thereof and an image-sidesurface being concave in a paraxial region thereof. Therefore, it isfavorable for light from large angle of view projecting onto an imagesurface. However, a shape design of the first lens element usually has abig influence on the dimension and size of a photographing module. Forexample, the center part of the first lens element may protrude out ofthe photographing module, and thus the photographing module isinapplicable to a compact portable electronic device. Accordingly, thereis a need for a photographing lens assembly having a first lens elementwith a proper shape on the object-side surface thereof for meeting therequirements of compact size and a wide view angle.

SUMMARY

According to one aspect of the present disclosure, a photographing lensassembly includes six lens elements. The six lens elements are, in orderfrom an object side to an image side, a first lens element, a secondlens element, a third lens element, a fourth lens element, a fifth lenselement and a sixth lens element. The first lens element with negativerefractive power has an object-side surface being concave in a paraxialregion thereof, wherein the object-side surface of the first lenselement has at least one convex critical point in an off-axis regionthereof. The third lens element has an image-side surface being convexin a paraxial region thereof. The fourth lens element has positiverefractive power. The fifth lens element with negative refractive powerhas an object-side surface being concave in a paraxial region thereofand an image-side surface being convex in a paraxial region thereof. Thesixth lens element has an image-side surface being concave in a paraxialregion thereof, wherein the image-side surface of the sixth lens elementhas at least one convex critical point in an off-axis region thereof,and an object-side surface and the image-side surface of the sixth lenselement are both aspheric. When a curvature radius of the object-sidesurface of the first lens element is R1, a curvature radius of animage-side surface of the first lens element is R2, a central thicknessof the sixth lens element is CT6, and an axial distance between thefifth lens element and the sixth lens element is T56, the followingconditions are satisfied:|R1/R2|<5.0; and1.60<CT6/T56<100.

According to another aspect of the present disclosure, a photographinglens assembly includes six lens elements. The six lens elements are, inorder from an object side to an image side, a first lens element, asecond lens element, a third lens element, a fourth lens element, afifth lens element and a sixth lens element. The first lens element withnegative refractive power has an object-side surface being concave in aparaxial region thereof, wherein the object-side surface of the firstlens element has at least one convex critical point in an off-axisregion thereof. The third lens element has an image-side surface beingconvex in a paraxial region thereof. The fourth lens element haspositive refractive power. The fifth lens element with negativerefractive power has an object-side surface being concave in a paraxialregion thereof and an image-side surface being convex in a paraxialregion thereof. The sixth lens element has an image-side surface beingconcave in a paraxial region thereof, wherein the image-side surface ofthe sixth lens element has at least one convex critical point in anoff-axis region thereof, and an object-side surface and the image-sidesurface of the sixth lens element are both aspheric. When a curvatureradius of the object-side surface of the first lens element is R1, acurvature radius of an image-side surface of the first lens element isR2, an axial distance between the first lens element and the second lenselement is T12, an axial distance between the second lens element andthe third lens element is T23, an axial distance between the third lenselement and the fourth lens element is T34, an axial distance betweenthe fourth lens element and the fifth lens element is T45, and an axialdistance between the fifth lens element and the sixth lens element isT56, the following conditions are satisfied:|R1/R2|≤3.0; and0<(T12+T56)/(T23+T34+T45)<3.0.

According to still another aspect of the present disclosure, an imagecapturing unit includes one of the aforementioned photographing lensassemblies and an image sensor, wherein the image sensor is disposed onan image surface of the photographing lens assembly.

According to yet another aspect of the present disclosure, an electronicdevice includes the aforementioned image capturing unit.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure can be more fully understood by reading the followingdetailed description of the embodiments, with reference made to theaccompanying drawings as follows:

FIG. 1 is a schematic view of an image capturing unit according to the1st embodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 1stembodiment;

FIG. 3 is a schematic view of an image capturing unit according to the2nd embodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 2ndembodiment;

FIG. 5 is a schematic view of an image capturing unit according to the3rd embodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 3rdembodiment;

FIG. 7 is a schematic view of an image capturing unit according to the4th embodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 4thembodiment;

FIG. 9 is a schematic view of an image capturing unit according to the5th embodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 5thembodiment;

FIG. 11 is a schematic view of an image capturing unit according to the6th embodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 6thembodiment;

FIG. 13 is a schematic view of an image capturing unit according to the7th embodiment of the present disclosure;

FIG. 14 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 7thembodiment;

FIG. 15 is a schematic view of an image capturing unit according to the8th embodiment of the present disclosure;

FIG. 16 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 8thembodiment;

FIG. 17 is a schematic view of an image capturing unit according to the9th embodiment of the present disclosure;

FIG. 18 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 9thembodiment;

FIG. 19 is a perspective view of an image capturing unit according tothe 10th embodiment of the present disclosure;

FIG. 20 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 10thembodiment;

FIG. 21 is a perspective view of an image capturing unit according tothe 11th embodiment of the present disclosure;

FIG. 22 is one perspective view of an electronic device according to the12th embodiment of the present disclosure;

FIG. 23 is another perspective view of the electronic device in FIG. 22;

FIG. 24 is a block diagram of the electronic device in FIG. 22;

FIG. 25 shows a schematic view of Y1R1 and Y6R2 according to the 1stembodiment of the present disclosure; and

FIG. 26 shows a schematic view of Sag52 according to the 1st embodimentof the present disclosure.

DETAILED DESCRIPTION

A photographing lens assembly includes, in order from an object side toan image side, a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element and a sixth lenselement.

The first lens element has negative refractive power; therefore, it isfavorable for providing the photographing lens assembly with a wide viewangle configuration. The first lens element has an object-side surfacebeing concave in a paraxial region thereof; therefore, it is favorablefor properly adjusting a shape of the object-side surface of the firstlens element in a paraxial region thereof. The object-side surface ofthe first lens element has at least one convex critical point in anoff-axis region thereof; therefore, it is favorable for thephotographing lens assembly to gather light from the off-axis region.

The second lens element can have positive refractive power; therefore,it is favorable for having sufficient positive refractive power so as toreduce the total track length of the photographing lens assembly. Thesecond lens element can have an object-side surface being convex in aparaxial region thereof; therefore, it is favorable for the second lenselement to have sufficient positive refractive power. The second lenselement can have an image-side surface being concave in a paraxialregion thereof; therefore, it is favorable for correcting aberrationsgenerated by the first lens element.

The third lens element has an image-side surface being convex in aparaxial region thereof. Therefore, it is favorable for correctingaberrations and reducing sensitivity so as to further improve the imagequality.

The fourth lens element has positive refractive power. Therefore, it isfavorable for increasing the light convergence capability and reducingthe total track length of the photographing lens assembly so as to meetthe requirement of compactness.

The fifth lens element has negative refractive power; therefore, it isfavorable for balancing the positive refractive power of the fourth lenselement and correcting chromatic aberration. The fifth lens element hasan object-side surface being concave in a paraxial region thereof and animage-side surface being convex in a paraxial region thereof; therefore,it is favorable for enhancing the symmetry of the photographing lensassembly so as to further reducing sensitivity, thereby improving theimage quality.

The sixth lens element can have positive refractive power; therefore,along with the fifth lens element having strong negative refractivepower, it is favorable for correcting off-axis aberrations and providingthe sixth lens element with a shape favorable for manufacturing (e.g.,lens element having large thickness and smooth shape). The sixth lenselement can have an object-side surface being convex in a paraxialregion thereof; therefore, it is favorable for reducing the total tracklength of the photographing lens assembly. The sixth lens element has animage-side surface being concave in a paraxial region thereof, and theimage-side surface of the sixth lens element has at least one convexcritical point in an off-axis region thereof; therefore, it is favorablefor correcting the Petzval sum of the photographing lens assembly so asto flatten the image surface and correct off-axis aberrations.

According to the present disclosure, among the second through the fifthlens elements, each of at least two lens elements can have at least onecritical point in an off-axis region thereof. In detail, when a lenselement has at least one critical point in an off-axis region thereof,either the object-side surface of the lens element, the image-sidesurface of the lens element or both have at least one critical point inan off-axis region thereof. Therefore, it is favorable for light at theoff-axis region traveling into the photographing lens assembly.

When a curvature radius of the object-side surface of the first lenselement is R1, and a curvature radius of an image-side surface of thefirst lens element is R2, the following condition is satisfied:|R1/R2|<5.0. Therefore, it is favorable for adjusting the shape of theobject-side surface of the first lens element, and for light at theoff-axis region traveling into the photographing lens assembly when theobject-side surface of the first lens element is concave. Preferably,the following condition can also be satisfied: |R1/R2|3.0.

When a central thickness of the sixth lens element is CT6, and an axialdistance between the fifth lens element and the sixth lens element isT56, the following condition can be satisfied: 1.60<CT6/T56<100.Therefore, it is favorable for obtaining a better optical and mechanicalconfiguration of the fifth lens element and sixth lens element byreducing the axial distance between these two lens elements whileefficiently utilizing the space in the photographing lens assembly andachieving compactness. Preferably, the following condition can also besatisfied: 2.0<CT6/T56<100.

When a maximum field of view of the photographing lens assembly is FOV,the following condition can be satisfied: 100 [deg.]<FOV<200 [deg.].Therefore, it is favorable for a wide view angle configuration.

When an f-number of the photographing lens assembly is FNo, thefollowing condition can be satisfied: 1.25<FNo<3.0. Therefore, it isfavorable for enlarging the aperture stop so as to capture enough imageinformation in low light condition (for example, in the night) ordynamic photography (for example, short exposure photography); also, itis favorable for increasing imaging speed so as to achieve high imagequality in a well-lit condition.

When a focal length of the fourth lens element is f4, and a focal lengthof the fifth lens element is f5, the following condition can besatisfied: |f5/f4|<1.50. Therefore, it is favorable for the fifth lenselement to have sufficient negative refractive power so as to correctaberrations generated by the fourth lens element having strong positiverefractive power.

When an axial distance between the first lens element and the secondlens element is T12, and an axial distance between the second lenselement and the third lens element is T23, the following condition canbe satisfied: T12/T23<1.60. Therefore, it is favorable for preventingthe axial distance between the first lens element and the second lenselement from being overly large so as to prevent assembling problems;furthermore, it is favorable for preventing the peripheral shape of thefirst lens element from being overly curved so as to prevent surfacereflection and molding problems.

When a focal length of the first lens element is f1, and a focal lengthof the sixth lens element is f6, the following condition can besatisfied: |f1/f6|<1.0. Therefore, it is favorable for preventingovercorrecting off-axis aberrations due to the refractive power of thesixth lens element being overly strong; furthermore, it is favorable forlight at the off-axis region traveling into the photographing lensassembly by preventing the refractive power of the first lens elementfrom being overly weak.

When a maximum effective radius of the object-side surface of the firstlens element is Y1R1, and a maximum effective radius of the image-sidesurface of the sixth lens element is Y6R2, the following condition canbe satisfied: 0.60<Y1R1/Y6R2<1.0. Therefore, it is favorable forpreventing the object side of the photographing lens assembly from beingoverly large, and the image side of the photographing lens assembly frombeing overly small, thereby increasing assembling yield rate; thus, itis favorable for the photographing lens assembly to be disposed incompact electronic devices. Please refer to FIG. 25, which shows aschematic view of Y1R1 and Y6R2 according to the 1st embodiment of thepresent disclosure.

When a curvature radius of an object-side surface of the third lenselement is R5, and a curvature radius of the image-side surface of thethird lens element is R6, the following condition can be satisfied:0.25<(R5+R6)/(R5−R6)<1.50. Therefore, a shape of the third lens elementis favorable configured with the first and the second lens elements andfor light converging onto the image surface.

When a focal length of the photographing lens assembly is f, a curvatureradius of the object-side surface of the second lens element is R3, anda curvature radius of the image-side surface of the second lens elementis R4, the following condition can be satisfied: 1.5<(f/R3)+(f/R4)<5.0.Therefore, a shape of the second lens element is favorable configuredwith the first lens element so as to prevent surface reflection at theoff-axis region, and ensure light at the off-axis region is able toconverge at the image surface.

When the axial distance between the first lens element and the secondlens element is T12, the axial distance between the second lens elementand the third lens element is T23, an axial distance between the thirdlens element and the fourth lens element is T34, an axial distancebetween the fourth lens element and the fifth lens element is T45, andthe axial distance between the fifth lens element and the sixth lenselement is T56, the following condition can be satisfied:0<(T12+T56)/(T23+T34+T45)<3.0. Therefore, it is favorable for keepingthe photographing lens assembly compact, and also favorable forpreventing the axial distance between the first lens element and thesecond lens element from being overly large so as to prevent assemblingproblems; moreover, it is favorable for preventing the shape of thefirst lens element from being overly curved so as to reduce surfacereflection and molding problems. Furthermore, it is favorable for evenlyarranging the distances between lens elements of the photographing lensassembly. Preferably, the following condition can also be satisfied:0.35<(T12+T56)/(T23+T34+T45)<1.75.

When the focal length of the photographing lens assembly is f, and thecentral thickness of the sixth lens element is CT6, the followingcondition can be satisfied: f/CT6<3.60. Therefore, it is favorable forproviding the sixth lens element with a shape being favorable formanufacturing (e.g., lens element having large thickness and smoothshape).

When a displacement in parallel with an optical axis from an axialvertex of the image-side surface of the fifth lens element to a maximumeffective radius position of the image-side surface of the fifth lenselement is Sag52, and a central thickness of the fifth lens element isCT5, the following condition can be satisfied: −0.75<Sag52/CT5<0.25.Therefore, the shape configuration in the off-axis region of the fifthlens element and sixth lens element is well integrated, such that theshape of the fifth lens element is favorable for manufacturing. Pleaserefer to FIG. 26, which shows a schematic view of Sag52 according to the1st embodiment of the present disclosure.

According to the present disclosure, the photographing lens assemblyfurther includes an aperture stop which can be located between thesecond lens element and the third lens element. Therefore, the locationof the aperture stop is favorable for obtaining a balance between largefield of view and compactness.

When an axial distance between the object-side surface of the first lenselement and an image surface is TL, and the curvature radius of theobject-side surface of the first lens element is R1, the followingcondition can be satisfied: −5.0<TL/R1<−0.50. Therefore, it is favorablefor further enhancing the feature of the object-side surface of thefirst lens element and allowing light at the off-axis region travelinginto the photographing lens assembly with the object-side surface of thefirst lens element being concave. Furthermore, it is favorable forreducing the total track length so as to keep the photographing lensassembly compact.

When the focal length of the photographing lens assembly is f, a focallength of the second lens element is f2, the focal length of the sixthlens element is f6, and a focal length of the i-th lens element is fi,the following condition can be satisfied: |f/f2|+|f/f6|<|f/fi|, whereini=1, 3, 4, 5. Therefore, it is favorable for preventing the refractivepower of any single lens element from being overly strong so as tocorrect aberrations properly.

According to the present disclosure, the lens elements thereof can bemade of glass or plastic material. When the lens elements are made ofglass material, the distribution of the refractive power of the lenssystem may be more flexible to design. When the lens elements are madeof plastic material, the manufacturing cost can be effectively reduced.Furthermore, surfaces of each lens element can be arranged to beaspheric, since the aspheric surface of the lens element is easy to forma shape other than spherical surface so as to have more controllablevariables for eliminating the aberration thereof, and to furtherdecrease the required number of the lens elements. Therefore, the totaltrack length of the lens system can also be reduced.

According to the present disclosure, each of an object-side surface andan image-side surface has a paraxial region and an off-axis region. Theparaxial region refers to the region of the surface where light raystravel close to the optical axis, and the off-axis region refers to theregion of the surface away from the paraxial region. Particularly, whenthe lens element has a convex surface, it indicates that the surface isconvex in the paraxial region thereof; when the lens element has aconcave surface, it indicates that the surface is concave in theparaxial region thereof. Moreover, when a region of refractive power orfocus of a lens element is not defined, it indicates that the region ofrefractive power or focus of the lens element is in the paraxial regionthereof.

According to the present disclosure, a critical point is a non-axialpoint of the lens surface where its tangent is perpendicular to theoptical axis.

According to the present disclosure, an image surface of thephotographing lens assembly, based on the corresponding image sensor,can be flat or curved, especially a curved surface being concave facingtowards the object side of the photographing lens assembly. Furthermore,an image correction unit, such as a field flattener, can be optionallydisposed between the lens elements of the photographing lens assemblyand the image surface for correction of aberrations such as fieldcurvature. The optical properties of the image correction unit, such ascurvature, thickness, index of refraction, position and surface shape(convex or concave surface with spherical, aspheric, diffraction orFresnel types), can be adjusted according to the demand of an imagecapturing unit. In general, a preferable image correction unit is, forexample, a thin transparent element having a concave object-side surfaceand a planar image-side surface, and the thin transparent element isdisposed near the image surface.

According to the present disclosure, the photographing lens assembly caninclude at least one stop, such as an aperture stop, a glare stop or afield stop. Said glare stop or said field stop is set for eliminatingthe stray light and thereby improving the image quality thereof.

According to the present disclosure, an aperture stop can be configuredas a front stop or a middle stop. A front stop disposed between animaged object and the first lens element can provide a longer distancebetween an exit pupil of the lens system and the image surface toproduce a telecentric effect, and thereby improves the image-sensingefficiency of an image sensor (for example, CCD or CMOS). A middle stopdisposed between the first lens element and the image surface isfavorable for enlarging the view angle of the photographing lensassembly and thereby provides a wider field of view for the same.

According to the above description of the present disclosure, thefollowing specific embodiments are provided for further explanation.

1st Embodiment

FIG. 1 is a schematic view of an image capturing unit according to the1st embodiment of the present disclosure. FIG. 2 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 1stembodiment. In FIG. 1, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 190. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 110, a first stop 101, a second lens element 120, anaperture stop 100, a third lens element 130, a second stop 102, a fourthlens element 140, a fifth lens element 150, a sixth lens element 160, anIR-cut filter 170 and an image surface 180. The photographing lensassembly includes six lens elements (110, 120, 130, 140, 150 and 160)with no additional lens element disposed between the first lens element110 and the sixth lens element 160.

The first lens element 110 with negative refractive power has anobject-side surface 111 being concave in a paraxial region thereof andan image-side surface 112 being concave in a paraxial region thereof.The first lens element 110 is made of plastic material and has theobject-side surface 111 and the image-side surface 112 being bothaspheric. The object-side surface 111 of the first lens element 110 hasat least one convex critical point in an off-axis region thereof.

The second lens element 120 with negative refractive power has anobject-side surface 121 being convex in a paraxial region thereof and animage-side surface 122 being concave in a paraxial region thereof. Thesecond lens element 120 is made of plastic material and has theobject-side surface 121 and the image-side surface 122 being bothaspheric.

The third lens element 130 with positive refractive power has anobject-side surface 131 being convex in a paraxial region thereof and animage-side surface 132 being convex in a paraxial region thereof. Thethird lens element 130 is made of plastic material and has theobject-side surface 131 and the image-side surface 132 being bothaspheric. The object-side surface 131 of the third lens element 130 hasat least one concave critical point in an off-axis region thereof.

The fourth lens element 140 with positive refractive power has anobject-side surface 141 being convex in a paraxial region thereof and animage-side surface 142 being convex in a paraxial region thereof. Thefourth lens element 140 is made of plastic material and has theobject-side surface 141 and the image-side surface 142 being bothaspheric. The object-side surface 141 of the fourth lens element 140 hasat least one concave critical point in an off-axis region thereof.

The fifth lens element 150 with negative refractive power has anobject-side surface 151 being concave in a paraxial region thereof andan image-side surface 152 being convex in a paraxial region thereof. Thefifth lens element 150 is made of plastic material and has theobject-side surface 151 and the image-side surface 152 being bothaspheric. The image-side surface 152 of the fifth lens element 150 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 160 with positive refractive power has anobject-side surface 161 being convex in a paraxial region thereof and animage-side surface 162 being concave in a paraxial region thereof. Thesixth lens element 160 is made of plastic material and has theobject-side surface 161 and the image-side surface 162 being bothaspheric. The object-side surface 161 of the sixth lens element 160 hasat least one concave critical point in an off-axis region thereof. Theimage-side surface 162 of the sixth lens element 160 has at least oneconvex critical point in an off-axis region thereof.

The IR-cut filter 170 is made of glass material and located between thesixth lens element 160 and the image surface 180, and will not affectthe focal length of the photographing lens assembly. The image sensor190 is disposed on or near the image surface 180 of the photographinglens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}/R} \right)/\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right) \times \left( {Y/R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}\;{({Ai}) \times \left( Y^{i} \right)}}}},$where,

X is the relative distance between a point on the aspheric surfacespaced at a distance Y from an optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to theoptical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient, and in the embodiments, i may be,but is not limited to, 4, 6, 8, 10, 12, 14 and 16.

In the photographing lens assembly of the image capturing unit accordingto the 1st embodiment, when a focal length of the photographing lensassembly is f, an f-number of the photographing lens assembly is FNo,and half of a maximum field of view of the photographing lens assemblyis HFOV, these parameters have the following values: f=1.91 millimeters(mm), FNo=2.38, HFOV=64.9 degrees (deg.).

When the maximum field of view of the photographing lens assembly isFOV, the following condition is satisfied: FOV=129.8 degrees.

When an axial distance between the first lens element 110 and the secondlens element 120 is T12, and an axial distance between the second lenselement 120 and the third lens element 130 is T23, the followingcondition is satisfied: T12/T23=1.52. In this embodiment, the axialdistance between two adjacent lens elements is the air gap in a paraxialregion between the two adjacent lens elements.

When the axial distance between the first lens element 110 and thesecond lens element 120 is T12, the axial distance between the secondlens element 120 and the third lens element 130 is T23, an axialdistance between the third lens element 130 and the fourth lens element140 is T34, an axial distance between the fourth lens element 140 andthe fifth lens element 150 is T45, and an axial distance between thefifth lens element 150 and the sixth lens element 160 is T56, thefollowing condition is satisfied: (T12+T56)/(T23+T34+T45)=0.52.

When a central thickness of the sixth lens element 160 is CT6, and theaxial distance between the fifth lens element 150 and the sixth lenselement 160 is T56, the following condition is satisfied: CT6/T56=30.33.

When an axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 180 is TL, and a curvature radiusof the object-side surface 111 of the first lens element 110 is R1, thefollowing condition is satisfied: TL/R1=−0.72.

When a displacement in parallel with an optical axis from an axialvertex of the image-side surface 152 of the fifth lens element 150 to amaximum effective radius position of the image-side surface 152 of thefifth lens element 150 is Sag52, and a central thickness of the fifthlens element 150 is CT5, the following condition is satisfied:Sag52/CT5=−0.26.

When a maximum effective radius of the object-side surface 111 of thefirst lens element 110 is Y1R1, and a maximum effective radius of theimage-side surface 162 of the sixth lens element 160 is Y6R2, thefollowing condition is satisfied: Y1R1/Y6R2=0.72.

When a curvature radius of the object-side surface 131 of the third lenselement 130 is R5, and a curvature radius of the image-side surface 132of the third lens element 130 is R6, the following condition issatisfied: (R5+R6)/(R5-R6)=0.36.

When the curvature radius of the object-side surface 111 of the firstlens element 110 is R1, and a curvature radius of the image-side surface112 of the first lens element 110 is R2, the following condition issatisfied: |R1/R2|=3.00.

When a focal length of the first lens element 110 is f1, and a focallength of the sixth lens element 160 is f6, the following condition issatisfied: |f1/f6|=0.40.

When a focal length of the fourth lens element 140 is f4, and a focallength of the fifth lens element 150 is f5, the following condition issatisfied: |f5/f4|=1.48.

When the focal length of the photographing lens assembly is f, a focallength of the second lens element 120 is f2, and the focal length of thesixth lens element 160 is f6, the following condition is satisfied:|f/f2|+|f/f6|=0.33.

When the focal length of the photographing lens assembly is f, and thefocal length of the first lens element 110 is f1, the followingcondition is satisfied: |f/f1|=0.63.

When the focal length of the photographing lens assembly is f, and afocal length of the third lens element 130 is f3, the followingcondition is satisfied: |f/f3|=0.63.

When the focal length of the photographing lens assembly is f, and thefocal length of the fourth lens element 140 is f4, the followingcondition is satisfied: |f/f4|=1.06.

When the focal length of the photographing lens assembly is f, and thefocal length of the fifth lens element 150 is f5, the followingcondition is satisfied: |f/f5|=0.71.

When the focal length of the photographing lens assembly is f, and thecentral thickness of the sixth lens element 160 is CT6, the followingcondition is satisfied: f/CT6=2.10.

When the focal length of the photographing lens assembly is f, acurvature radius of the object-side surface 121 of the second lenselement 120 is R3, and a curvature radius of the image-side surface 122of the second lens element 120 is R4, the following condition issatisfied: (f/R3)+(f/R4)=3.88.

The detailed optical data of the 1st embodiment are shown in Table 1 andthe aspheric surface data are shown in Table 2 below.

TABLE 1 1st Embodiment f = 1.91 mm, FNo = 2.38, HFOV = 64.9 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Lens 1 −6.623 (ASP) 0.280 Plastic 1.545 56.0−3.01 2 2.208 (ASP) 0.471 3 1st Stop Plano −0.093 4 Lens 2 1.074 (ASP)0.280 Plastic 1.634 23.8 −26.29 5 0.907 (ASP) 0.246 6 Ape. Stop Plano0.002 7 Lens 3 4.978 (ASP) 0.448 Plastic 1.544 56.0 3.01 8 −2.361 (ASP)0.005 9 2nd Stop Plano 0.104 10 Lens 4 1.888 (ASP) 0.513 Plastic 1.54456.0 1.81 11 −1.858 (ASP) 0.431 12 Lens 5 −0.688 (ASP) 0.270 Plastic1.669 19.5 −2.68 13 −1.292 (ASP) 0.030 14 Lens 6 1.293 (ASP) 0.910Plastic 1.544 56.0 7.45 15 1.428 (ASP) 0.350 16 IR-cut filter Plano0.110 Glass 1.517 64.2 — 17 Plano 0.440 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line). An effective radius of the first stop101 (Surface 3) is 0.760 mm. An effective radius of the second stop 102(Surface 9) is 0.580 mm.

TABLE 2 Aspheric Coefficients Surface # 1 2 4 5 7 8 k = −9.0000E+01−4.8546E+01 −2.9821E−01 −2.2154E+00 −1.0000E+00 −7.0937E+00 A4 =4.6522E−01 1.1387E+00 −2.4394E−01 5.8340E−02 −1.8625E−01 −1.2218E+00 A6= −5.0741E−01 −1.1767E+00 2.1870E−01 2.7610E−01 2.9922E−04 3.0948E+00 A8= 3.8280E−01 1.2389E+00 −2.6810E+00 −1.6170E+00 −3.9220E−01 −9.7931E+00A10 = −1.8927E−01 −7.4276E−01 4.8506E+00 2.6706E+00 1.8190E+001.9493E+01 A12 = 5.4102E−02 9.9420E−02 −4.3633E+00 9.6354E+00−4.5406E+00 −2.0518E+01 A14 = −6.4451E−03 3.0359E−02 1.5230E+00 — — —Surface # 10 11 12 13 14 15 k = −6.0990E+01 −2.7973E+01 −3.8536E+00−4.2189E+00 −1.0946E+01 −1.3814E+01 A4 = −6.7874E−02 −6.5358E−014.5572E−01 5.9751E−01 −1.3977E−01 −5.0854E−02 A6 = −1.8766E+008.6458E−01 −3.1121E+00 −1.7526E+00 1.1546E−01 3.8660E−02 A8 = 8.3722E+00−1.8613E+00 9.1246E+00 3.4447E+00 −1.1734E−01 −4.0656E−02 A10 =−2.2107E+01 3.2712E+00 −1.2546E+01 −3.5792E+00 9.1784E−02 2.3122E−02 A12= 3.7683E+01 −1.2743E+00 8.5309E+00 1.9905E+00 −3.9262E−02 −7.4847E−03A14 = −3.3549E+01 −2.3014E+00 −2.4861E+00 −5.6417E−01 8.1662E−031.3352E−03 A16 = — — — 6.3808E−02 −6.8025E−04 −1.0438E−04

In Table 1, the curvature radius, the thickness and the focal length areshown in millimeters (mm). Surface numbers 0-18 represent the surfacessequentially arranged from the object side to the image side along theoptical axis. In Table 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-A16 represent the asphericcoefficients ranging from the 4th order to the 16th order. The tablespresented below for each embodiment are the corresponding schematicparameter and aberration curves, and the definitions of the tables arethe same as Table 1 and Table 2 of the 1st embodiment. Therefore, anexplanation in this regard will not be provided again.

2nd Embodiment

FIG. 3 is a schematic view of an image capturing unit according to the2nd embodiment of the present disclosure. FIG. 4 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 2ndembodiment. In FIG. 3, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 290. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 210, a second lens element 220, an aperture stop 200,a third lens element 230, a stop 201, a fourth lens element 240, a fifthlens element 250, a sixth lens element 260, an IR-cut filter 270 and animage surface 280. The photographing lens assembly includes six lenselements (210, 220, 230, 240, 250 and 260) with no additional lenselement disposed between the first lens element 210 and the sixth lenselement 260.

The first lens element 210 with negative refractive power has anobject-side surface 211 being concave in a paraxial region thereof andan image-side surface 212 being concave in a paraxial region thereof.The first lens element 210 is made of plastic material and has theobject-side surface 211 and the image-side surface 212 being bothaspheric. The object-side surface 211 of the first lens element 210 hasat least one convex critical point in an off-axis region thereof.

The second lens element 220 with negative refractive power has anobject-side surface 221 being convex in a paraxial region thereof and animage-side surface 222 being concave in a paraxial region thereof. Thesecond lens element 220 is made of plastic material and has theobject-side surface 221 and the image-side surface 222 being bothaspheric.

The third lens element 230 with positive refractive power has anobject-side surface 231 being convex in a paraxial region thereof and animage-side surface 232 being convex in a paraxial region thereof. Thethird lens element 230 is made of plastic material and has theobject-side surface 231 and the image-side surface 232 being bothaspheric. The object-side surface 231 of the third lens element 230 hasat least one concave critical point in an off-axis region thereof.

The fourth lens element 240 with positive refractive power has anobject-side surface 241 being convex in a paraxial region thereof and animage-side surface 242 being convex in a paraxial region thereof. Thefourth lens element 240 is made of plastic material and has theobject-side surface 241 and the image-side surface 242 being bothaspheric. The object-side surface 241 of the fourth lens element 240 hasat least one concave critical point in an off-axis region thereof.

The fifth lens element 250 with negative refractive power has anobject-side surface 251 being concave in a paraxial region thereof andan image-side surface 252 being convex in a paraxial region thereof. Thefifth lens element 250 is made of plastic material and has theobject-side surface 251 and the image-side surface 252 being bothaspheric. The image-side surface 252 of the fifth lens element 250 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 260 with positive refractive power has anobject-side surface 261 being convex in a paraxial region thereof and animage-side surface 262 being concave in a paraxial region thereof. Thesixth lens element 260 is made of plastic material and has theobject-side surface 261 and the image-side surface 262 being bothaspheric. The object-side surface 261 of the sixth lens element 260 hasat least one concave critical point in an off-axis region thereof. Theimage-side surface 262 of the sixth lens element 260 has at least oneconvex critical point in an off-axis region thereof.

The IR-cut filter 270 is made of glass material and located between thesixth lens element 260 and the image surface 280, and will not affectthe focal length of the photographing lens assembly. The image sensor290 is disposed on or near the image surface 280 of the photographinglens assembly.

The detailed optical data of the 2nd embodiment are shown in Table 3 andthe aspheric surface data are shown in Table 4 below.

TABLE 3 2nd Embodiment f = 1.84 mm, FNo = 2.35, HFOV = 65.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Lens 1 −7.431 (ASP) 0.280 Plastic 1.515 56.5−2.97 2 1.949 (ASP) 0.359 3 Lens 2 0.959 (ASP) 0.280 Plastic 1.621 24.4−32.78 4 0.813 (ASP) 0.284 5 Ape. Stop Plano 0.014 6 Lens 3 6.620 (ASP)0.393 Plastic 1.544 55.9 3.62 7 −2.743 (ASP) 0.000 8 Stop Plano 0.103 9Lens 4 1.710 (ASP) 0.570 Plastic 1.544 55.9 1.71 10 −1.809 (ASP) 0.37011 Lens 5 −0.794 (ASP) 0.270 Plastic 1.669 19.5 −2.46 12 −1.748 (ASP)0.034 13 Lens 6 1.077 (ASP) 0.923 Plastic 1.544 55.9 4.52 14 1.338 (ASP)0.350 15 IR-cut filter Plano 0.110 Glass 1.517 64.2 — 16 Plano 0.446 17Image Plano — Note: Reference wavelength is 587.6 nm (d-line). Aneffective radius of the stop 201 (Surface 8) is 0.640 mm.

TABLE 4 Aspheric Coefficients Surface # 1 2 3 4 6 7 k = −8.5869E+01−4.3640E+01 −7.9062E−02 −2.0225E+00 −5.8844E+01 5.4188E−01 A4 =5.0010E−01 1.2346E+00 −2.3787E−01 1.0615E−01 −1.8429E−01 −1.2570E+00 A6= −6.1502E−01 −1.4142E+00 7.2251E−01 2.9420E+00 −1.0165E+00 3.5463E+00A8 = 4.5692E−01 4.9472E−01 −6.3433E+00 −2.3577E+01 6.9893E+00−1.1745E+01 A10 = −2.0411E−01 6.3417E−01 1.5928E+01 8.5504E+01−2.7112E+01 2.4423E+01 A12 = 5.0257E−02 −5.8068E−01 −1.9213E+01−1.1307E+02 3.3441E+01 −2.6481E+01 A14 = −5.0983E−03 1.2791E−018.0434E+00 — — — Surface # 9 10 11 12 13 14 k = −4.7466E+01 −5.1817E+01−6.2484E+00 −3.5885E+00 −9.6820E+00 −1.2607E+01 A4 = 1.6031E−02−8.8536E−01 6.9812E−01 8.6301E−01 −1.4521E−01 −4.7004E−02 A6 =−1.7501E+00 2.0689E+00 −4.3916E+00 −2.6713E+00 6.0843E−02 3.1913E−02 A8= 7.4623E+00 −6.1164E+00 1.0529E+01 4.8803E+00 −4.8670E−02 −4.2279E−02A10 = −1.4495E+01 1.2330E+01 −1.2252E+01 −4.8708E+00 7.0201E−022.7314E−02 A12 = 1.5300E+01 −1.1593E+01 7.1449E+00 2.6732E+00−4.9226E−02 −9.3555E−03 A14 = −7.8169E+00 3.5561E+00 −1.8544E+00−7.5737E−01 1.4829E−02 1.6571E−03 A16 = — — — 8.6168E−02 −1.6026E−03−1.2358E−04

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 3 and Table 4 asthe following values and satisfy the following conditions:

2nd Embodiment f [mm] 1.84 |R1/R2| 3.81 FNo 2.35 |f1/f6| 0.66 HFOV[deg.] 65.0 |f5/f4| 1.44 FOV [deg.] 130.0 |f/f2| + |f/f6| 0.46 T12/T231.20 |f/f1| 0.62 (T12 + T56)/(T23 + T34 + T45) 0.51 |f/f3| 0.51 CT6/T5627.15 |f/f4| 1.08 TL/R1 −0.64 |f/f5| 0.75 Sag52/CTS −0.09 f/CT6 1.99Y1R1/Y6R2 0.78 (f/R3) + (f/R4) 4.18 (R5 + R6)/(R5 − R6) 0.41 — —

3rd Embodiment

FIG. 5 is a schematic view of an image capturing unit according to the3rd embodiment of the present disclosure. FIG. 6 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 3rdembodiment. In FIG. 5, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 390. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 310, a first stop 301, a second lens element 320, anaperture stop 300, a third lens element 330, a second stop 302, a fourthlens element 340, a fifth lens element 350, a sixth lens element 360, anIR-cut filter 370 and an image surface 380. The photographing lensassembly includes six lens elements (310, 320, 330, 340, 350 and 360)with no additional lens element disposed between the first lens element310 and the sixth lens element 360.

The first lens element 310 with negative refractive power has anobject-side surface 311 being concave in a paraxial region thereof andan image-side surface 312 being concave in a paraxial region thereof.The first lens element 310 is made of plastic material and has theobject-side surface 311 and the image-side surface 312 being bothaspheric. The object-side surface 311 of the first lens element 310 hasat least one convex critical point in an off-axis region thereof.

The second lens element 320 with positive refractive power has anobject-side surface 321 being convex in a paraxial region thereof and animage-side surface 322 being concave in a paraxial region thereof. Thesecond lens element 320 is made of plastic material and has theobject-side surface 321 and the image-side surface 322 being bothaspheric.

The third lens element 330 with positive refractive power has anobject-side surface 331 being convex in a paraxial region thereof and animage-side surface 332 being convex in a paraxial region thereof. Thethird lens element 330 is made of plastic material and has theobject-side surface 331 and the image-side surface 332 being bothaspheric. The object-side surface 331 of the third lens element 330 hasat least one concave critical point in an off-axis region thereof.

The fourth lens element 340 with positive refractive power has anobject-side surface 341 being convex in a paraxial region thereof and animage-side surface 342 being convex in a paraxial region thereof. Thefourth lens element 340 is made of plastic material and has theobject-side surface 341 and the image-side surface 342 being bothaspheric.

The fifth lens element 350 with negative refractive power has anobject-side surface 351 being concave in a paraxial region thereof andan image-side surface 352 being convex in a paraxial region thereof. Thefifth lens element 350 is made of plastic material and has theobject-side surface 351 and the image-side surface 352 being bothaspheric. The image-side surface 352 of the fifth lens element 350 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 360 with positive refractive power has anobject-side surface 361 being convex in a paraxial region thereof and animage-side surface 362 being concave in a paraxial region thereof. Thesixth lens element 360 is made of plastic material and has theobject-side surface 361 and the image-side surface 362 being bothaspheric. The object-side surface 361 of the sixth lens element 360 hasat least one concave critical point in an off-axis region thereof. Theimage-side surface 362 of the sixth lens element 360 has at least oneconvex critical point in an off-axis region thereof.

The IR-cut filter 370 is made of glass material and located between thesixth lens element 360 and the image surface 380, and will not affectthe focal length of the photographing lens assembly. The image sensor390 is disposed on or near the image surface 380 of the photographinglens assembly.

The detailed optical data of the 3rd embodiment are shown in Table 5 andthe aspheric surface data are shown in Table 6 below.

TABLE 5 3rd Embodiment f = 1.97 mm, FNo = 2.43, HFOV = 60.1 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Lens 1 −2.726 (ASP) 0.295 Plastic 1.545 56.1−2.59 2 3.046 (ASP) 0.361 3 1st Stop Plano −0.088 4 Lens 2 1.124 (ASP)0.302 Plastic 1.614 26.0 17.28 5 1.129 (ASP) 0.201 6 Ape. Stop Plano0.023 7 Lens 3 7.657 (ASP) 0.427 Plastic 1.545 56.1 3.22 8 −2.228 (ASP)−0.008 9 2nd Stop Plano 0.103 10 Lens 4 1.650 (ASP) 0.568 Plastic 1.54556.0 1.42 11 −1.279 (ASP) 0.136 12 Lens 5 −0.690 (ASP) 0.270 Plastic1.614 26.0 −1.78 13 −2.164 (ASP) 0.239 14 Lens 6 1.460 (ASP) 1.055Plastic 1.544 56.0 7.68 15 1.671 (ASP) 0.450 16 IR-cut filter Plano0.110 Glass 1.517 64.2 — 17 Plano 0.336 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line). An effective radius of the first stop301 (Surface 3) is 0.760 mm. An effective radius of the second stop 302(Surface 9) is 0.580 mm. An effective radius of the image-side surface342 (Surface 11) is 0.760 mm.

TABLE 6 Aspheric Coefficients Surface # 1 2 4 5 7 8 k = −9.0000E+01−9.0000E+01   0.0000E+00 −2.5875E+00 −1.0227E+00   8.7838E−01 A4 =  3.5786E−01   1.2858E+00 −1.2019E−01   1.9885E−01 −2.2916E−01−1.4798E+00 A6 = −4.0367E−01 −2.6000E+00 −1.0938E+00 −1.9634E+00−1.2909E+00   4.5768E+00 A8 =   3.4974E−01   4.7854E+00   3.6371E+00  1.5224E+01   7.0205E+00 −1.4535E+01 A10 = −1.9091E−01 −4.9090E+00−8.7633E+00 −5.3234E+01 −2.4884E+01   2.7036E+01 A12 =   5.8562E−02  2.4832E+00   9.3878E+00   7.8496E+01   2.2674E+01 −2.6646E+01 A14 =−7.4800E−03 −4.4657E−01 −3.4178E+00 — — — Surface # 10 11 12 13 14 15 k= −2.8218E+01 −1.2738E+01 −2.0878E+00 −3.3094E+00 −1.8452E+01−7.4936E+00 A4 = −4.8061E−01 −8.4587E−01   9.4784E−02 −5.5563E−02−1.3996E−01 −8.6749E−02 A6 =   1.0739E+00   4.7020E−01   4.5012E−01  2.1570E+00   5.3708E−02   5.3038E−02 A8 = −1.1511E+00   5.4402E+00  1.8353E+00 −5.4097E+00   4.6715E−02 −3.8087E−02 A10 =   1.2282E+00−2.0446E+01 −1.3588E+01   6.3799E+00 −8.2739E−02   1.9653E−02 A12 =−7.5361E−01   2.9481E+01   2.1554E+01 −4.0511E+00   4.5319E−02−6.5157E−03 A14 = −1.2008E+00 −1.6204E+01 −1.1022E+01   1.3505E+00−1.0774E−02   1.1875E−03 A16 = — — — −1.8605E−01   8.6020E−04−9.0911E−05

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 3rd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 5 and Table 6 asthe following values and satisfy the following conditions:

3rd Embodiment f [mm] 1.97 |R1/R2| 0.89 FNo 2.43 |f1/f6| 0.34 HFOV[deg.] 60.1 |f5/f4| 1.25 FOV [deg.] 120.2 |f/f2| + |f/f6| 0.37 T12/T231.22 |f/f1| 0.76 (T12 + T56)/(T23 + T34 + T45) 1.13 |f/f3| 0.61 CT6/T564.41 |f/f4| 1.39 TL/R1 −1.75 |f/f5| 1.11 Sag52/CT5 −0.10 f/CT6 1.87Y1R1/Y6R2 0.68 (f/R3) + (f/R4) 3.50 (R5 + R6)/(R5 − R6) 0.55 — —

4th Embodiment

FIG. 7 is a schematic view of an image capturing unit according to the4th embodiment of the present disclosure. FIG. 8 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 4thembodiment. In FIG. 7, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 490. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 410, a stop 401, a second lens element 420, anaperture stop 400, a third lens element 430, a fourth lens element 440,a fifth lens element 450, a sixth lens element 460, an IR-cut filter 470and an image surface 480. The photographing lens assembly includes sixlens elements (410, 420, 430, 440, 450 and 460) with no additional lenselement disposed between the first lens element 410 and the sixth lenselement 460.

The first lens element 410 with negative refractive power has anobject-side surface 411 being concave in a paraxial region thereof andan image-side surface 412 being concave in a paraxial region thereof.The first lens element 410 is made of plastic material and has theobject-side surface 411 and the image-side surface 412 being bothaspheric. The object-side surface 411 of the first lens element 410 hasat least one convex critical point in an off-axis region thereof.

The second lens element 420 with positive refractive power has anobject-side surface 421 being convex in a paraxial region thereof and animage-side surface 422 being concave in a paraxial region thereof. Thesecond lens element 420 is made of plastic material and has theobject-side surface 421 and the image-side surface 422 being bothaspheric.

The third lens element 430 with positive refractive power has anobject-side surface 431 being convex in a paraxial region thereof and animage-side surface 432 being convex in a paraxial region thereof. Thethird lens element 430 is made of plastic material and has theobject-side surface 431 and the image-side surface 432 being bothaspheric. The object-side surface 431 of the third lens element 430 hasat least one concave critical point in an off-axis region thereof.

The fourth lens element 440 with positive refractive power has anobject-side surface 441 being convex in a paraxial region thereof and animage-side surface 442 being convex in a paraxial region thereof. Thefourth lens element 440 is made of plastic material and has theobject-side surface 441 and the image-side surface 442 being bothaspheric. The object-side surface 441 of the fourth lens element 440 hasat least one concave critical point in an off-axis region thereof.

The fifth lens element 450 with negative refractive power has anobject-side surface 451 being concave in a paraxial region thereof andan image-side surface 452 being convex in a paraxial region thereof. Thefifth lens element 450 is made of plastic material and has theobject-side surface 451 and the image-side surface 452 being bothaspheric.

The sixth lens element 460 with positive refractive power has anobject-side surface 461 being convex in a paraxial region thereof and animage-side surface 462 being concave in a paraxial region thereof. Thesixth lens element 460 is made of plastic material and has theobject-side surface 461 and the image-side surface 462 being bothaspheric. The object-side surface 461 of the sixth lens element 460 hasat least one concave critical point and at least one convex criticalpoint in an off-axis region thereof. The image-side surface 462 of thesixth lens element 460 has at least one convex critical point in anoff-axis region thereof.

The IR-cut filter 470 is made of glass material and located between thesixth lens element 460 and the image surface 480, and will not affectthe focal length of the photographing lens assembly. The image sensor490 is disposed on or near the image surface 480 of the photographinglens assembly.

The detailed optical data of the 4th embodiment are shown in Table 7 andthe aspheric surface data are shown in Table 8 below.

TABLE 7 4th Embodiment f = 1.77 mm, FNo = 2.40, HFOV = 60.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 −2.318 (ASP) 0.280 Plastic 1.545 56.1 −1.86 21.885 (ASP) 0.591 3 Stop Plano −0.383 4 Lens 2 0.862 (ASP) 0.465 Plastic1.582 30.2 3.22 5 1.279 (ASP) 0.290 6 Ape. Stop Plano 0.018 7 Lens 39.593 (ASP) 0.469 Plastic 1.534 55.9 3.18 8 −2.024 (ASP) 0.089 9 Lens 42.865 (ASP) 0.524 Plastic 1.545 56.1 1.59 10 −1.166 (ASP) 0.099 11 Lens5 −0.625 (ASP) 0.270 Plastic 1.660 20.4 −2.27 12 −1.255 (ASP) 0.315 13Lens 6 1.079 (ASP) 0.773 Plastic 1.544 56.0 7.67 14 1.088 (ASP) 0.450 15IR-cut filter Plano 0.110 Glass 1.517 64.2 — 16 Plano 0.372 17 ImagePlano — Note: Reference wavelength is 587.6 nm (d-line). An effectiveradius of the stop 401 (Surface 3) is 0.860 mm. An effective radius ofthe image-side surface 442 (Surface 10) is 0.760 mm.

TABLE 8 Aspheric Coefficients Surface # 1 2 4 5 7 8 k = −1.0000E+00−2.5038E+01 −2.5648E+00 −3.9360E+01 −9.0000E+01 −3.6221E+01 A4 =  2.8488E−01   1.0572E−01 −3.8153E−02   2.2321E+00 −2.4425E−01−1.8935E+00 A6 = −1.6235E−01   3.2892E−01   2.6363E−01 −1.3243E+01  1.6361E−01   5.3206E+00 A8 =   7.4425E−02 −1.3769E−01   1.5027E+00  7.1932E+01 −5.9417E+00 −1.7236E+01 A10 = −2.3042E−02 −3.8753E−02−3.0127E+00 −2.0259E+02   1.9564E+01   3.5471E+01 A12 =   4.2203E−03  5.6968E−03   1.6102E+00   2.4148E+02 −3.2067E+01 −3.4817E+01 A14 =−3.3296E−04   4.9449E−03 — — — — Surface # 9 10 11 12 13 14 k =−9.0000E+01 −1.6661E+01 −1.3824E+00 −5.6331E+00 −1.0237E+01 −6.3013E+00A4 = −6.8478E−01 −1.1984E+00   5.2788E−02 −7.4019E−01 −2.4818E−01−1.1252E−01 A6 =   7.1244E−01   2.1423E+00   2.5907E+00   4.2653E+00  3.0055E−01   8.2989E−02 A8 = −1.5332E+00   1.2697E+00 −3.7899E+00−9.2112E+00 −3.3830E−01 −5.5403E−02 A10 =   8.8018E+00 −1.6061E+01−7.2088E+00   1.1092E+01   2.3983E−01   2.3862E−02 A12 = −1.6266E+01  2.7444E+01   2.0042E+01 −7.8849E+00 −9.3228E−02 −6.3738E−03 A14 =  9.5887E+00 −1.5469E+01 −1.3419E+01   3.1315E+00   1.8615E−02  9.3319E−04 A16 = — — — −5.4534E−01 −1.5061E−03 −5.5305E−05

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 4th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 7 and Table 8 asthe following values and satisfy the following conditions:

4th Embodiment f [mm] 1.77 |R1/R2| 1.23 FNo 2.40 |f1/f6| 0.24 HFOV[deg.] 60.0 |f5/f4| 1.43 FOV [deg.] 120.0 |f/f2| + |f/f6| 0.78 T12/T230.68 |f/f1| 0.95 (T12 + T56)/(T23 + T34 + T45) 1.05 |f/f3| 0.56 CT6/T562.45 |f/f4| 1.11 TL/R1 −2.04 |f/f5| 0.78 Sag52/CT5 −0.59 f/CT6 2.29Y1R1/Y6R2 0.88 (f/R3) + (f/R4) 3.44 (R5 + R6)/(R5 − R6) 0.65 — —

5th Embodiment

FIG. 9 is a schematic view of an image capturing unit according to the5th embodiment of the present disclosure. FIG. 10 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 5thembodiment. In FIG. 9, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 590. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 510, a stop 501, a second lens element 520, anaperture stop 500, a third lens element 530, a fourth lens element 540,a fifth lens element 550, a sixth lens element 560, an IR-cut filter 570and an image surface 580. The photographing lens assembly includes sixlens elements (510, 520, 530, 540, 550 and 560) with no additional lenselement disposed between the first lens element 510 and the sixth lenselement 560.

The first lens element 510 with negative refractive power has anobject-side surface 511 being concave in a paraxial region thereof andan image-side surface 512 being concave in a paraxial region thereof.The first lens element 510 is made of plastic material and has theobject-side surface 511 and the image-side surface 512 being bothaspheric. The object-side surface 511 of the first lens element 510 hasat least one convex critical point in an off-axis region thereof.

The second lens element 520 with positive refractive power has anobject-side surface 521 being convex in a paraxial region thereof and animage-side surface 522 being concave in a paraxial region thereof. Thesecond lens element 520 is made of plastic material and has theobject-side surface 521 and the image-side surface 522 being bothaspheric.

The third lens element 530 with positive refractive power has anobject-side surface 531 being convex in a paraxial region thereof and animage-side surface 532 being convex in a paraxial region thereof. Thethird lens element 530 is made of plastic material and has theobject-side surface 531 and the image-side surface 532 being bothaspheric.

The fourth lens element 540 with positive refractive power has anobject-side surface 541 being convex in a paraxial region thereof and animage-side surface 542 being convex in a paraxial region thereof. Thefourth lens element 540 is made of plastic material and has theobject-side surface 541 and the image-side surface 542 being bothaspheric. The object-side surface 541 of the fourth lens element 540 hasat least one concave critical point in an off-axis region thereof.

The fifth lens element 550 with negative refractive power has anobject-side surface 551 being concave in a paraxial region thereof andan image-side surface 552 being convex in a paraxial region thereof. Thefifth lens element 550 is made of plastic material and has theobject-side surface 551 and the image-side surface 552 being bothaspheric. The image-side surface 552 of the fifth lens element 550 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 560 with positive refractive power has anobject-side surface 561 being convex in a paraxial region thereof and animage-side surface 562 being concave in a paraxial region thereof. Thesixth lens element 560 is made of plastic material and has theobject-side surface 561 and the image-side surface 562 being bothaspheric. The object-side surface 561 of the sixth lens element 560 hasat least one concave critical point in an off-axis region thereof. Theimage-side surface 562 of the sixth lens element 560 has at least oneconvex critical point in an off-axis region thereof.

The IR-cut filter 570 is made of glass material and located between thesixth lens element 560 and the image surface 580, and will not affectthe focal length of the photographing lens assembly. The image sensor590 is disposed on or near the image surface 580 of the photographinglens assembly.

The detailed optical data of the 5th embodiment are shown in Table 9 andthe aspheric surface data are shown in Table 10 below.

TABLE 9 5th Embodiment f = 1.77 mm, FNo = 2.42, HFOV = 60.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 −5.046 (ASP) 0.280 Plastic 1.545 56.1 −1.63 21.097 (ASP) 0.458 3 Stop Plano −0.183 4 Lens 2 1.014 (ASP) 0.458 Plastic1.566 37.6 2.71 5 2.500 (ASP) 0.260 6 Ape. Stop Plano 0.040 7 Lens 374.973 (ASP) 0.360 Plastic 1.545 56.1 3.51 8 −1.962 (ASP) 0.118 9 Lens 42.250 (ASP) 0.572 Plastic 1.545 56.1 1.43 10 −1.087 (ASP) 0.084 11 Lens5 −0.601 (ASP) 0.270 Plastic 1.639 23.5 −1.63 12 −1.664 (ASP) 0.300 13Lens 6 1.073 (ASP) 0.750 Plastic 1.544 56.0 5.34 14 1.283 (ASP) 0.350 15IR-cut filter Plano 0.110 Glass 1.517 64.2 — 16 Plano 0.543 17 ImagePlano — Note: Reference wavelength is 587.6 nm (d-line). An effectiveradius of the stop 501 (Surface 3) is 0.850 mm. An effective radius ofthe image-side surface 532 (Surface 8) is 0.540 mm. An effective radiusof the image-side surface 542 (Surface 10) is 0.780 mm.

TABLE 10 Aspheric Coefficients Surface # 1 2 4 5 7 8 k = −1.0000E+00−6.7824E+00 −2.7807E+00 −8.5071E+00 −9.9000E+01   7.7183E−02 A4 =  1.9958E−01   4.9078E−01 −1.2761E−02   8.5520E−02 −3.3575E−01−1.1610E+00 A6 = −1.4646E−01 −5.2990E−01 −1.4096E−01   1.4145E−01−5.7070E−01   2.1851E+00 A8 =   9.1338E−02   5.9621E−01   1.4623E−01−9.3943E−01 −7.7578E−01 −7.4686E+00 A10 = −3.7156E−02 −1.6839E−01−3.9593E−02   3.9558E+00 −2.1305E+00   1.4907E+01 A12 =   8.6125E−03−1.2035E−01 — −2.3031E+00 −1.2282E+01 −2.0160E+01 A14 = −8.4514E−04  5.1698E−02 — — — — Surface # 9 10 11 12 13 14 k = −1.2838E+00−2.0557E+00 −1.3069E+00 −5.0307E+00 −8.8644E+00 −6.6989E+00 A4 =−8.5623E−01   2.4577E−01   1.1845E+00   7.7241E−02 −1.0800E−01−7.5411E−02 A6 =   1.5923E+00 −3.2781E+00 −3.2385E+00   1.3149E+00  2.6347E−03   2.8305E−02 A8 = −4.4442E+00   1.4201E+01   1.0468E+01−3.2483E+00   5.6587E−02 −1.1975E−02 A10 =   1.3747E+01 −3.3103E+01−2.4324E+01   3.5185E+00 −6.3255E−02   3.3015E−03 A12 = −2.2508E+01  3.7104E+01   2.6424E+01 −1.9717E+00   3.2341E−02 −7.3105E−04 A14 =  1.3336E+01 −1.6515E+01 −1.0839E+01   5.4986E−01 −7.7456E−03  1.0240E−04 A16 = — — — −6.0177E−02   7.0213E−04 −6.7178E−06

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 5th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 9 and Table 10as the following values and satisfy the following conditions:

5th Embodiment f [mm] 1.77 |R1/R2| 4.60 FNo 2.42 |f1/f6| 0.31 HFOV[deg.] 60.0 |f5/f4| 1.14 FOV [deg.] 120.0 |f/f2| + |f/f6| 0.98 T12/T230.92 |f/f1| 1.09 (T12 + T56)/(T23 + T34 + T45) 1.15 |f/f3| 0.50 CT6/T562.50 |f/f4| 1.24 TL/R1 −0.95 |f/f5| 1.09 Sag52/CT5 −0.20 f/CT6 2.36Y1R1/Y6R2 0.80 (f/R3) + (f/R4)| 2.45 (R5 + R6)/(R5 − R6) 0.95 — —

6th Embodiment

FIG. 11 is a schematic view of an image capturing unit according to the6th embodiment of the present disclosure. FIG. 12 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 6thembodiment. In FIG. 11, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 690. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 610, a first stop 601, a second lens element 620, anaperture stop 600, a third lens element 630, a second stop 602, a fourthlens element 640, a fifth lens element 650, a sixth lens element 660, anIR-cut filter 670 and an image surface 680. The photographing lensassembly includes six lens elements (610, 620, 630, 640, 650 and 660)with no additional lens element disposed between the first lens element610 and the sixth lens element 660.

The first lens element 610 with negative refractive power has anobject-side surface 611 being concave in a paraxial region thereof andan image-side surface 612 being concave in a paraxial region thereof.The first lens element 610 is made of plastic material and has theobject-side surface 611 and the image-side surface 612 being bothaspheric. The object-side surface 611 of the first lens element 610 hasat least one convex critical point in an off-axis region thereof.

The second lens element 620 with positive refractive power has anobject-side surface 621 being convex in a paraxial region thereof and animage-side surface 622 being concave in a paraxial region thereof. Thesecond lens element 620 is made of plastic material and has theobject-side surface 621 and the image-side surface 622 being bothaspheric.

The third lens element 630 with positive refractive power has anobject-side surface 631 being convex in a paraxial region thereof and animage-side surface 632 being convex in a paraxial region thereof. Thethird lens element 630 is made of plastic material and has theobject-side surface 631 and the image-side surface 632 being bothaspheric. The object-side surface 631 of the third lens element 630 hasat least one concave critical point in an off-axis region thereof.

The fourth lens element 640 with positive refractive power has anobject-side surface 641 being convex in a paraxial region thereof and animage-side surface 642 being convex in a paraxial region thereof. Thefourth lens element 640 is made of plastic material and has theobject-side surface 641 and the image-side surface 642 being bothaspheric.

The fifth lens element 650 with negative refractive power has anobject-side surface 651 being concave in a paraxial region thereof andan image-side surface 652 being convex in a paraxial region thereof. Thefifth lens element 650 is made of plastic material and has theobject-side surface 651 and the image-side surface 652 being bothaspheric. The image-side surface 652 of the fifth lens element 650 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 660 with positive refractive power has anobject-side surface 661 being convex in a paraxial region thereof and animage-side surface 662 being concave in a paraxial region thereof. Thesixth lens element 660 is made of plastic material and has theobject-side surface 661 and the image-side surface 662 being bothaspheric. The object-side surface 661 of the sixth lens element 660 hasat least one concave critical point in an off-axis region thereof. Theimage-side surface 662 of the sixth lens element 660 has at least oneconvex critical point in an off-axis region thereof.

The IR-cut filter 670 is made of glass material and located between thesixth lens element 660 and the image surface 680, and will not affectthe focal length of the photographing lens assembly. The image sensor690 is disposed on or near the image surface 680 of the photographinglens assembly.

The detailed optical data of the 6th embodiment are shown in Table 11and the aspheric surface data are shown in Table 12 below.

TABLE 11 6th Embodiment f = 1.96 mm, FNo = 2.43, HFOV = 60.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −2.537 (ASP) 0.290 Plastic 1.545 56.1−2.78 2 3.922 (ASP) 0.380 3 1st Stop Plano −0.094 4 Lens 2 1.095 (ASP)0.294 Plastic 1.614 26.0 25.86 5 1.056 (ASP) 0.220 6 Ape. Stop Plano0.018 7 Lens 3 7.942 (ASP) 0.423 Plastic 1.545 56.1 3.37 8 −2.347 (ASP)−0.010 9 2nd Stop Plano 0.097 10 Lens 4 1.576 (ASP) 0.564 Plastic 1.54556.1 1.44 11 −1.362 (ASP) 0.127 12 Lens 5 −0.733 (ASP) 0.270 Plastic1.614 26.0 −1.85 13 −2.366 (ASP) 0.249 14 Lens 6 1.439 (ASP) 1.059Plastic 1.544 56.0 7.41 15 1.658 (ASP) 0.350 16 IR-cut filter Plano0.110 Glass 1.517 64.2 — 17 Plano 0.433 18 Image Plano — Note: Referencewavelength is 587.6 nm (d-line). An effective radius of the first stop601 (Surface 3) is 0.770 mm. An effective radius of the second stop 602(Surface 9) is 0.580 mm. An effective radius of the image-side surface642 (Surface 11) is 0.760 mm.

TABLE 12 Aspheric Coefficients Surface # 1 2 4 5 7 8 k = −9.0000E+01−9.0000E+01   0.0000E+00 −2.0997E+00 −4.1434E+00 −9.4913E−02 A4 =  3.9518E−01   1.3264E+00   1.1274E−02   2.6341E−01 −2.2861E−01−1.6234E+00 A6 = −4.3867E−01 −2.4654E+00 −1.1371E+00 −1.7414E+00−1.2910E+00   5.3124E+00 A8 =   3.5136E−01   4.4646E+00   3.5494E+00  1.3351E+01   6.6395E+00 −1.7149E+01 A10 = −1.7611E−01 −4.7534E+00−9.5389E+00 −5.0238E+01 −2.4178E+01   3.2222E+01 A12 =   4.9188E−02  2.4832E+00   1.1237E+01   7.8496E+01   2.2674E+01 −3.1217E+01 A14 =−5.7757E−03 −4.4657E−01 −4.5597E+00 — — — Surface # 10 11 12 13 14 15 k= −2.6058E+01 −1.4812E+01 −2.2063E+00 −1.4343E+00 −1.8167E+01−8.1466E+00 A4 = −5.4293E−01 −9.1383E−01 −1.7661E−01 −1.8693E−01−1.5004E−01 −8.0039E−02 A6 =   1.3935E+00   2.9724E−01   1.3579E+00  2.7060E+00   9.7392E−02   4.7279E−02 A8 = −1.9404E+00   7.7542E+00  1.4133E+00 −6.3740E+00 −5.0415E−02 −3.5296E−02 A10 =   2.6706E+00−2.6422E+01 −1.5796E+01   7.3285E+00   2.9829E−02   1.8474E−02 A12 =−2.9220E+00   3.5425E+01   2.5244E+01 −4.5671E+00 −2.3214E−02−6.0693E−03 A14 =   4.5367E−01 −1.8121E+01 −1.2712E+01   1.4966E+00  9.2054E−03   1.0922E−03 A16 = — — — −2.0363E−01 −1.2223E−03−8.3492E−05

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 6th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 11 and Table 12as the following values and satisfy the following conditions:

6th Embodiment f [mm] 1.96 |R1/R2| 0.65 FNo 2.43 |f1/f6| 0.38 HFOV[deg.] 60.0 |f5/f4| 1.28 FOV [deg.] 120.0 |f/f2| + |f/f6| 0.34 T12/T231.20 |f/f1| 0.71 (T12 + T56)/(T23 + T34 + T45) 1.18 |f/f3| 0.58 CT6/T564.25 |f/f4| 1.36 TL/R1 −1.88 |f/f5| 1.06 Sag52/CT5 −0.06 f/CT6 1.85Y1R1/Y6R2 0.68 (f/R3) + (f/R4) 3.65 (R5 + R6)/(R5 − R6) 0.54 — —

7th Embodiment

FIG. 13 is a schematic view of an image capturing unit according to the7th embodiment of the present disclosure. FIG. 14 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 7thembodiment. In FIG. 13, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 790. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 710, a second lens element 720, an aperture stop 700,a third lens element 730, a fourth lens element 740, a fifth lenselement 750, a sixth lens element 760, an IR-cut filter 770 and an imagesurface 780. The photographing lens assembly includes six lens elements(710, 720, 730, 740, 750 and 760) with no additional lens elementdisposed between the first lens element 710 and the sixth lens element760.

The first lens element 710 with negative refractive power has anobject-side surface 711 being concave in a paraxial region thereof andan image-side surface 712 being concave in a paraxial region thereof.The first lens element 710 is made of plastic material and has theobject-side surface 711 and the image-side surface 712 being bothaspheric. The object-side surface 711 of the first lens element 710 hasat least one convex critical point in an off-axis region thereof.

The second lens element 720 with positive refractive power has anobject-side surface 721 being convex in a paraxial region thereof and animage-side surface 722 being concave in a paraxial region thereof. Thesecond lens element 720 is made of plastic material and has theobject-side surface 721 and the image-side surface 722 being bothaspheric.

The third lens element 730 with positive refractive power has anobject-side surface 731 being convex in a paraxial region thereof and animage-side surface 732 being convex in a paraxial region thereof. Thethird lens element 730 is made of plastic material and has theobject-side surface 731 and the image-side surface 732 being bothaspheric.

The fourth lens element 740 with positive refractive power has anobject-side surface 741 being convex in a paraxial region thereof and animage-side surface 742 being convex in a paraxial region thereof. Thefourth lens element 740 is made of plastic material and has theobject-side surface 741 and the image-side surface 742 being bothaspheric. The object-side surface 741 of the fourth lens element 740 hasat least one concave critical point in an off-axis region thereof.

The fifth lens element 750 with negative refractive power has anobject-side surface 751 being concave in a paraxial region thereof andan image-side surface 752 being convex in a paraxial region thereof. Thefifth lens element 750 is made of plastic material and has theobject-side surface 751 and the image-side surface 752 being bothaspheric. The image-side surface 752 of the fifth lens element 750 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 760 with positive refractive power has anobject-side surface 761 being convex in a paraxial region thereof and animage-side surface 762 being concave in a paraxial region thereof. Thesixth lens element 760 is made of plastic material and has theobject-side surface 761 and the image-side surface 762 being bothaspheric. The object-side surface 761 of the sixth lens element 760 hasat least one concave critical point in an off-axis region thereof. Theimage-side surface 762 of the sixth lens element 760 has at least oneconvex critical point in an off-axis region thereof.

The IR-cut filter 770 is made of glass material and located between thesixth lens element 760 and the image surface 780, and will not affectthe focal length of the photographing lens assembly. The image sensor790 is disposed on or near the image surface 780 of the photographinglens assembly.

The detailed optical data of the 7th embodiment are shown in Table 13and the aspheric surface data are shown in Table 14 below.

TABLE 13 7th Embodiment f = 2.26 mm, FNo = 2.40, HFOV = 62.5 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −6.391 (ASP) 0.407 Plastic 1.545 56.0−2.04 2 1.371 (ASP) 0.272 3 Lens 2 1.035 (ASP) 0.366 Plastic 1.544 55.93.36 4 2.089 (ASP) 0.323 5 Ape. Stop Plano 0.035 6 Lens 3 5.594 (ASP)0.595 Plastic 1.544 55.9 2.54 7 −1.767 (ASP) 0.250 8 Lens 4 33.623 (ASP)0.849 Plastic 1.544 55.9 2.17 9 −1.215 (ASP) 0.125 10 Lens 5 −0.620(ASP) 0.396 Plastic 1.660 20.4 −2.66 11 −1.203 (ASP) 0.124 12 Lens 61.284 (ASP) 0.639 Plastic 1.544 55.9 19.77 13 1.203 (ASP) 0.750 14IR-cut filter Plano 0.210 Glass 1.517 64.2 — 15 Plano 0.420 16 ImagePlano — Note: Reference wavelength is 587.6 nm (d-line).

TABLE 14 Aspheric Coefficients Surface # 1 2 3 4 6 7 k = −5.6826E−01−3.5940E−01 −7.2456E+00 −8.3313E+00 −1.1631E+01 −5.8671E+00 A4 =  9.3899E−02 −1.0805E−01   5.7017E−01   3.6665E−01   1.1520E−02−2.5653E−01 A6 = −3.9778E−02   1.5211E−01 −1.2912E+00 −4.2109E−01  1.0624E−01   1.4694E−02 A8 =   1.4389E−02 −1.4200E−01   2.3374E+00  2.6294E+00 −5.3765E−01 −4.7381E−02 A10 = −3.3355E−03   6.9825E−02−2.3887E+00 −5.3765E+00   1.0823E+00 −8.2475E−02 A12 =   4.4882E−04−1.5129E−02   8.7873E−01   5.2599E+00 −7.8266E−01   7.2483E−02 A14=−2.4670E−05 — — — — — Surface # 8 9 10 11 12 13 k = −1.2244E+01−1.0555E+00 −2.5790E+00 −6.0974E+00 −1.4971E+00 −1.6803E+00 A4 =−1.0405E−01 −7.2149E−02   3.1426E−02   2.5724E−02 −2.8009E−01−1.7559E−01 A6 =   4.2330E−02   6.0700E−01   2.7171E−01   4.5380E−02  1.1712E−01   7.3294E−02 A8 = −1.6955E−01 −1.5376E+00 −8.7025E−01−3.2678E−02 −3.9128E−02 −2.1710E−02 A10 =   9.3788E−02   1.4797E+00  7.4126E−01   9.4117E−03   9.7782E−03   4.0404E−03 A12 = −7.5502E−02−6.6179E−01 −2.0404E−01 −4.9656E−04 −1.3638E−03 −4.3760E−04 A14 = —  1.2110E−01 — −3.9166E−04   7.6227E−05   2.0446E−05 A16 = — — —  6.7004E−05 — —

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 7th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 13 and Table 14as the following values and satisfy the following conditions:

7th Embodiment f [mm] 2.26 |R1/R2| 4.66 FNo 2.40 |f1/f6| 0.10 HFOV[deg.] 62.5 |f5/f4| 1.23 FOV [deg.] 125.0 |f/f2| + |f/f6| 0.79 T12/T230.76 |f/f1| 1.11 (T12 + T56)/(T23 + T34 + T45) 0.54 |f/f3| 0.89 CT6/T565.15 |f/f4| 1.04 TL/R1 −0.90 |f/f5| 0.85 Sag52/CT5 −0.62 f/CT6 3.54Y1R1/Y6R2 0.80 (f/R3) + (f/R4) 3.27 (R5 + R6)/(R5 − R6) 0.52 — —

8th Embodiment

FIG. 15 is a schematic view of an image capturing unit according to the8th embodiment of the present disclosure. FIG. 16 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 8thembodiment. In FIG. 15, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 890. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 810, a second lens element 820, an aperture stop 800,a third lens element 830, a fourth lens element 840, a fifth lenselement 850, a sixth lens element 860, an IR-cut filter 870 and an imagesurface 880. The photographing lens assembly includes six lens elements(810, 820, 830, 840, 850 and 860) with no additional lens elementdisposed between the first lens element 810 and the sixth lens element860.

The first lens element 810 with negative refractive power has anobject-side surface 811 being concave in a paraxial region thereof andan image-side surface 812 being concave in a paraxial region thereof.The first lens element 810 is made of plastic material and has theobject-side surface 811 and the image-side surface 812 being bothaspheric. The object-side surface 811 of the first lens element 810 hasat least one convex critical point in an off-axis region thereof.

The second lens element 820 with positive refractive power has anobject-side surface 821 being convex in a paraxial region thereof and animage-side surface 822 being concave in a paraxial region thereof. Thesecond lens element 820 is made of plastic material and has theobject-side surface 821 and the image-side surface 822 being bothaspheric.

The third lens element 830 with positive refractive power has anobject-side surface 831 being convex in a paraxial region thereof and animage-side surface 832 being convex in a paraxial region thereof. Thethird lens element 830 is made of plastic material and has theobject-side surface 831 and the image-side surface 832 being bothaspheric.

The fourth lens element 840 with positive refractive power has anobject-side surface 841 being convex in a paraxial region thereof and animage-side surface 842 being convex in a paraxial region thereof. Thefourth lens element 840 is made of plastic material and has theobject-side surface 841 and the image-side surface 842 being bothaspheric. The object-side surface 841 of the fourth lens element 840 hasat least one concave critical point in an off-axis region thereof.

The fifth lens element 850 with negative refractive power has anobject-side surface 851 being concave in a paraxial region thereof andan image-side surface 852 being convex in a paraxial region thereof. Thefifth lens element 850 is made of plastic material and has theobject-side surface 851 and the image-side surface 852 being bothaspheric.

The sixth lens element 860 with positive refractive power has anobject-side surface 861 being convex in a paraxial region thereof and animage-side surface 862 being concave in a paraxial region thereof. Thesixth lens element 860 is made of plastic material and has theobject-side surface 861 and the image-side surface 862 being bothaspheric. The object-side surface 861 of the sixth lens element 860 hasat least one concave critical point in an off-axis region thereof. Theimage-side surface 862 of the sixth lens element 860 has at least oneconvex critical point in an off-axis region thereof.

The IR-cut filter 870 is made of glass material and located between thesixth lens element 860 and the image surface 880, and will not affectthe focal length of the photographing lens assembly. The image sensor890 is disposed on or near the image surface 880 of the photographinglens assembly.

The detailed optical data of the 8th embodiment are shown in Table 15and the aspheric surface data are shown in Table 16 below.

TABLE 15 8th Embodiment f = 1.88 mm, FNo = 2.05, HFOV = 60.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −5.476 (ASP) 0.270 Plastic 1.515 56.5−1.85 2 1.169 (ASP) 0.194 3 Lens 2 1.147 (ASP) 0.439 Plastic 1.594 30.62.97 4 2.817 (ASP) 0.434 5 Ape. Stop Plano −0.023 6 Lens 3 4.101 (ASP)0.461 Plastic 1.545 56.1 3.42 7 −3.285 (ASP) 0.122 8 Lens 4 7.441 (ASP)0.516 Plastic 1.545 56.1 2.66 9 −1.753 (ASP) 0.513 10 Lens 5 −0.416(ASP) 0.270 Plastic 1.660 20.4 −1.86 11 −0.791 (ASP) 0.030 12 Lens 60.857 (ASP) 0.777 Plastic 1.545 56.1 2.05 13 2.498 (ASP) 0.400 14 IR-cutfilter Plano 0.210 Glass 1.517 64.2 — 15 Plano 0.530 16 Image Plano —Note: Reference wavelength is 587.6 nm (d-line).

TABLE 16 Aspheric Coefficients Surface # 1 2 3 4 6 7 k = −1.0000E+00−1.2640E+00 −8.0159E−03   9.0000E+00 −2.1883E+01   1.5378E+01 A4 =  8.5285E−02 −1.9304E−01 −1.8637E−01   2.6401E−01   1.0061E−01−1.8186E−01 A6 = −3.4356E−02   6.0825E−02 −1.1823E−01 −6.1124E−02  1.5096E−02   9.8873E−02 A8 =   1.0315E−02   4.9625E−03   2.8365E−01  6.5121E−01 −1.3154E−01 −9.5487E−02 A10 = −1.7161E−03 −3.9752E−03−2.2452E−01 — —   2.6658E−01 A12 =   1.3478E−04   1.1003E−03 — — — —Surface # 8 9 10 11 12 13 k = −7.3367E+01 −7.0948E+00 −3.1074E+00−4.3393E+00 −7.9460E+00 −1.6994E+00 A4 = −1.8761E−01 −2.4552E−01−9.5066E−01 −5.2242E−01 −4.5292E−03 −1.0010E−01 A6 = −9.3138E−02−6.2528E−02   2.5406E+00   1.1418E+00 −1.1352E−03   7.1820E−02 A8 =  3.7932E−01   1.2662E−01 −4.0713E+00 −9.5468E−01   1.2702E−03−3.3321E−02 A10 = −1.6983E+00 −2.9908E−01   4.1646E+00   4.1119E−01−3.8439E−03   8.5617E−03 A12 =   3.5907E+00   5.0605E−01 −2.3664E+00−8.9487E−02   1.5957E−03 −1.2525E−03 A14 = −2.1278E+00 —   5.1631E−01  6.2496E−03 −2.4469E−04   9.5527E−05 A16 = — — —   4.2209E−04  1.3086E−05 −2.9035E−06

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 8th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 15 and Table 16as the following values and satisfy the following conditions:

8th Embodiment f [mm] 1.88 |R1/R2| 4.68 FNo 2.05 |f1/f6| 0.90 HFOV[deg.] 60.0 |f5/f4| 0.70 FOV [deg.] 120.0 |f/f2| + |f/f6| 1.55 T12/T230.47 |f/f1| 1.02 (T12 + T56)/(T23 + T34 + T45) 0.21 |f/f3| 0.55 CT6/T5625.90 |f/f4| 0.71 TL/R1 −0.94 |f/f5| 1.01 Sag52/CT5 −1.53 f/CT6 2.42Y1R1/Y6R2 0.78 (f/R3) + (f/R4) 2.31 (R5 + R6)/(R5 − R6) 0.11 — —

9th Embodiment

FIG. 17 is a schematic view of an image capturing unit according to the9th embodiment of the present disclosure. FIG. 18 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 9thembodiment. In FIG. 17, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 990. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 910, a stop 901, a second lens element 920, anaperture stop 900, a third lens element 930, a fourth lens element 940,a fifth lens element 950, a sixth lens element 960, an IR-cut filter 970and an image surface 980. The photographing lens assembly includes sixlens elements (910, 920, 930, 940, 950 and 960) with no additional lenselement disposed between the first lens element 910 and the sixth lenselement 960.

The first lens element 910 with negative refractive power has anobject-side surface 911 being concave in a paraxial region thereof andan image-side surface 912 being concave in a paraxial region thereof.The first lens element 910 is made of plastic material and has theobject-side surface 911 and the image-side surface 912 being bothaspheric. The object-side surface 911 of the first lens element 910 hasat least one convex critical point in an off-axis region thereof.

The second lens element 920 with positive refractive power has anobject-side surface 921 being convex in a paraxial region thereof and animage-side surface 922 being concave in a paraxial region thereof. Thesecond lens element 920 is made of plastic material and has theobject-side surface 921 and the image-side surface 922 being bothaspheric.

The third lens element 930 with positive refractive power has anobject-side surface 931 being concave in a paraxial region thereof andan image-side surface 932 being convex in a paraxial region thereof. Thethird lens element 930 is made of plastic material and has theobject-side surface 931 and the image-side surface 932 being bothaspheric.

The fourth lens element 940 with positive refractive power has anobject-side surface 941 being convex in a paraxial region thereof and animage-side surface 942 being convex in a paraxial region thereof. Thefourth lens element 940 is made of plastic material and has theobject-side surface 941 and the image-side surface 942 being bothaspheric. The object-side surface 941 of the fourth lens element 940 hasat least one concave critical point in an off-axis region thereof.

The fifth lens element 950 with negative refractive power has anobject-side surface 951 being concave in a paraxial region thereof andan image-side surface 952 being convex in a paraxial region thereof. Thefifth lens element 950 is made of plastic material and has theobject-side surface 951 and the image-side surface 952 being bothaspheric. The image-side surface 952 of the fifth lens element 950 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 960 with positive refractive power has anobject-side surface 961 being convex in a paraxial region thereof and animage-side surface 962 being concave in a paraxial region thereof. Thesixth lens element 960 is made of plastic material and has theobject-side surface 961 and the image-side surface 962 being bothaspheric. The object-side surface 961 of the sixth lens element 960 hasat least one concave critical point in an off-axis region thereof. Theimage-side surface 962 of the sixth lens element 960 has at least oneconvex critical point in an off-axis region thereof.

The IR-cut filter 970 is made of glass material and located between thesixth lens element 960 and the image surface 980, and will not affectthe focal length of the photographing lens assembly. The image sensor990 is disposed on or near the image surface 980 of the photographinglens assembly.

The detailed optical data of the 9th embodiment are shown in Table 17and the aspheric surface data are shown in Table 18 below.

TABLE 17 9th Embodiment f = 1.28 mm, FNo = 2.25, HFOV = 59.9 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −3.979 (ASP) 0.500 Plastic 1.511 56.8−1.81 2 1.255 (ASP) 0.674 3 Stop Plano −0.114 4 Lens 2 1.533 (ASP) 0.694Plastic 1.566 37.6 3.33 5 6.793 (ASP) 0.214 6 Ape. Stop Plano 0.028 7Lens 3 −96.454 (ASP) 0.383 Plastic 1.544 55.9 2.83 8 −1.517 (ASP) 0.1039 Lens 4 1.926 (ASP) 0.612 Plastic 1.544 55.9 1.46 10 −1.204 (ASP) 0.08811 Lens 5 −0.623 (ASP) 0.270 Plastic 1.650 21.5 −1.37 12 −2.407 (ASP)0.170 13 Lens 6 0.879 (ASP) 0.643 Plastic 1.544 55.9 4.20 14 1.060 (ASP)0.350 15 IR-cut filter Plano 0.110 Glass 1.517 64.2 — 16 Plano 0.211 17Image Plano — Note: Reference wavelength is 587.6 nm (d-line). Aneffective radius of the stop 901 (Surface 3) is 0.900 mm. An effectiveradius of the image-side surface 932 (Surface 8) is 0.540 mm.

TABLE 18 Aspheric Coefficients Surface # 1 2 4 5 7 8 k = −2.2161E+00−6.3912E+00 −2.9833E+00 −6.7319E+00 −1.0000E+00   1.1464E−02 A4 =  1.0765E−01   3.6234E−01 −5.9090E−02   1.0696E−01 −2.1092E−01−8.3003E−01 A6 = −5.3886E−02 −2.4889E−01   7.6811E−02   2.6794E−01  1.6334E−01   6.9010E−01 A8 =   1.9212E−02   1.7728E−01 −1.9567E−01−4.5708E−01 −9.4780E+00 −1.1630E−01 A10 = −4.2945E−03 −1.0074E−01  7.9619E−02   7.8463E−01   3.7960E+01 −5.7777E+00 A12 =   5.4412E−04  4.0369E−02 — −6.8620E−01 −9.6128E+01 −2.6224E+00 A14 = −2.9473E−05−6.3272E−03 — — — — Surface # 9 10 11 12 13 14 k = −1.5363E+00−1.1120E+00 −1.0948E+00 −4.1770E+00 −8.2827E+00 −6.0488E+00 A4 =−6.7220E−01   3.5231E−01   1.2395E+00 −4.3881E−01 −5.5554E−01−2.1922E−01 A6 =   1.1685E+00 −6.7029E+00 −5.9912E+00   3.9600E+00  1.0570E+00   2.5031E−01 A8 = −2.6917E+00   3.2244E+01   2.6757E+01−9.0220E+00 −1.6404E+00 −2.2128E−01 A10 =   7.7096E+00 −7.3799E+01−6.4076E+01   1.0389E+01   1.7059E+00   1.2043E−01 A12 = −1.4479E+01  8.0058E+01   6.9828E+01 −6.6472E+00 −1.0822E+00 −4.0859E−02 A14 =  9.5475E+00 −3.4010E+01 −2.8431E+01   2.2493E+00   3.7203E−01  7.5289E−03 A16 = — — — −3.1295E−01 −5.3444E−02 −5.5371E−04

In the 9th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 9th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 17 and Table 18as the following values and satisfy the following conditions:

9th Embodiment f [mm] 1.28 |R1/R2| 3.17 FNo 2.25 |f1/f6| 0.43 HFOV[deg.] 59.9 |f5/f4| 0.94 FOV [deg.] 119.8 |f/f2| + |f/f6| 0.69 T12/T232.31 |f/f1| 0.71 (T12 + T56)/(T23 + T34 + T45) 1.69 |f/f3| 0.45 CT6/T563.78 |f/f4| 0.88 TL/R1 −1.24 |f/f5| 0.93 Sag52/CT5 −0.06 f/CT6 1.99Y1R1/Y6R2 1.34 (f/R3) + (f/R4) 1.02 (R5 + R6)/(R5 − R6) 1.03 — —

10th Embodiment

FIG. 19 is a schematic view of an image capturing unit according to the10th embodiment of the present disclosure. FIG. 20 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 10thembodiment. In FIG. 19, the image capturing unit includes thephotographing lens assembly (its reference numeral is omitted) of thepresent disclosure and an image sensor 1090. The photographing lensassembly includes, in order from an object side to an image side, afirst lens element 1010, a second lens element 1020, an aperture stop1000, a third lens element 1030, a fourth lens element 1040, a fifthlens element 1050, a sixth lens element 1060, an IR-cut filter 1070 andan image surface 1080. The photographing lens assembly includes six lenselements (1010, 1020, 1030, 1040, 1050 and 1060) with no additional lenselement disposed between the first lens element 1010 and the sixth lenselement 1060.

The first lens element 1010 with negative refractive power has anobject-side surface 1011 being concave in a paraxial region thereof andan image-side surface 1012 being concave in a paraxial region thereof.The first lens element 1010 is made of plastic material and has theobject-side surface 1011 and the image-side surface 1012 being bothaspheric. The object-side surface 1011 of the first lens element 1010has at least one convex critical point in an off-axis region thereof.

The second lens element 1020 with positive refractive power has anobject-side surface 1021 being convex in a paraxial region thereof andan image-side surface 1022 being concave in a paraxial region thereof.The second lens element 1020 is made of plastic material and has theobject-side surface 1021 and the image-side surface 1022 being bothaspheric.

The third lens element 1030 with positive refractive power has anobject-side surface 1031 being convex in a paraxial region thereof andan image-side surface 1032 being convex in a paraxial region thereof.The third lens element 1030 is made of plastic material and has theobject-side surface 1031 and the image-side surface 1032 being bothaspheric.

The fourth lens element 1040 with positive refractive power has anobject-side surface 1041 being concave in a paraxial region thereof andan image-side surface 1042 being convex in a paraxial region thereof.The fourth lens element 1040 is made of plastic material and has theobject-side surface 1041 and the image-side surface 1042 being bothaspheric.

The fifth lens element 1050 with negative refractive power has anobject-side surface 1051 being concave in a paraxial region thereof andan image-side surface 1052 being convex in a paraxial region thereof.The fifth lens element 1050 is made of plastic material and has theobject-side surface 1051 and the image-side surface 1052 being bothaspheric.

The sixth lens element 1060 with negative refractive power has anobject-side surface 1061 being convex in a paraxial region thereof andan image-side surface 1062 being concave in a paraxial region thereof.The sixth lens element 1060 is made of plastic material and has theobject-side surface 1061 and the image-side surface 1062 being bothaspheric. The object-side surface 1061 of the sixth lens element 1060has at least one concave critical point in an off-axis region thereof.The image-side surface 1062 of the sixth lens element 1060 has at leastone convex critical point in an off-axis region thereof.

The IR-cut filter 1070 is made of glass material and located between thesixth lens element 1060 and the image surface 1080, and will not affectthe focal length of the photographing lens assembly. The image sensor1090 is disposed on or near the image surface 1080 of the photographinglens assembly.

The detailed optical data of the 10th embodiment are shown in Table 19and the aspheric surface data are shown in Table 20 below.

TABLE 19 10th embodiment f = 2.18 mm, FNo = 2.25, HFOV = 62.5 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −6.224 (ASP) 0.465 Plastic 1.545 56.0−2.46 2 1.751 (ASP) 0.313 3 Lens 2 1.453 (ASP) 0.392 Plastic 1.584 28.25.59 4 2.354 (ASP) 0.302 5 Ape. Stop Plano 0.028 6 Lens 3 4.401 (ASP)0.609 Plastic 1.545 56.0 2.65 7 −2.044 (ASP) 0.191 8 Lens 4 −99.204(ASP) 0.828 Plastic 1.545 56.0 1.78 9 −0.964 (ASP) 0.115 10 Lens 5−0.584 (ASP) 0.355 Plastic 1.671 19.5 −2.86 11 −1.045 (ASP) 0.396 12Lens 6 1.592 (ASP) 0.699 Plastic 1.544 55.9 −72.01 13 1.294 (ASP) 0.65014 IR-cut filter Plano 0.210 Glass 1.517 64.2 — 15 Plano 0.430 16 ImagePlano — Note: Reference wavelength is 587.6 nm (d-line).

TABLE 20 Aspheric Coefficients Surface # 1 2 3 4 6 7 k = −1.8075E+012.0468E−01 −7.2456E+00 −8.3313E+00 −1.1631E+01 −5.8671E+00 A4 =  9.8916E−02   1.2976E−03   1.4808E−01   1.6852E−01 −4.3387E−03−2.3213E−01 A6 = −4.5364E−02   1.7217E−01 −1.1543E−01   2.5262E−03  1.3754E−01 −1.0762E−01 A8 =   1.8670E−02 −2.1531E−01   2.9022E−01  1.2279E+00 −5.9447E−01   2.5260E−01 A10 = −5.0294E−03   2.5900E−01−1.4018E−01 −2.8351E+00   1.0701E+00 −2.3611E−01 A12 =   7.6320E−04−9.8438E−02 −4.2324E−02   3.1982E+00 −7.1005E−01   4.9713E−02 A14 =−4.7555E−05 — — — — — Surface # 8 9 10 11 12 13 k = −1.2244E+01−1.4337E+00 −3.1230E+00 −6.0974E+00 −1.1620E+00 −1.1600E+00 A4 =−1.2900E−01   3.2902E−01 −6.0579E−02 −8.4092E−02 −1.9664E−01 −1.6205E−01A6 = −6.0444E−02 −9.3533E−01 −3.0656E−02   8.9882E−02   4.7851E−02  5.2465E−02 A8 =   2.0976E−03   1.1767E+00   2.2539E−01   1.3855E−01−4.4689E−03 −1.2300E−02 A10 =   8.9558E−02 −9.4755E−01 −3.0232E−01−2.3448E−01 −4.2152E−04   1.8613E−03 A12 = −5.8447E−02   3.9572E−01  1.0310E−01   1.3609E−01   1.5307E−04 −1.6484E−04 A14 = — −5.3320E−02 —−3.6264E−02 −1.1309E−05   6.3714E−06 A16 = — — —   3.7264E−03 — —

In the 10th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 10th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 19 and Table 20as the following values and satisfy the following conditions:

10th Embodiment f [mm] 2.18 |R1/R2| 3.55 FNo 2.25 |f1/f6| 0.03 HFOV[deg.] 62.5 |f5/f4| 1.61 FOV [deg.] 125.0 |f/f2| + |f/f6| 0.42 T12/T230.95 |f/f1| 0.89 (T12 + T56)/(T23 + T34 + T45) 1.11 |f/f3| 0.82 CT6/T561.77 |f/f4| 1.22 TL/R1 −0.96 |f/f5| 0.76 Sag52/CT5 −0.97 f/CT6 3.12Y1R1/Y6R2 0.75 (f/R3) + (f/R4) 2.43 (R5 + R6)/(R5 − R6) 0.37 — —

11th Embodiment

FIG. 21 is a perspective view of an image capturing unit according tothe 11th embodiment of the present disclosure. In this embodiment, animage capturing unit 10 is a camera module including a lens unit 11, adriving device 12, an image sensor 13 and an image stabilizer 14. Thelens unit 11 includes the photographing lens assembly disclosed in the1st embodiment, a barrel and a holder member (their reference numeralsare omitted) for holding the photographing lens assembly. The imaginglight converges into the lens unit 11 of the image capturing unit 10 togenerate an image with the driving device 12 utilized for image focusingon the image sensor 13, and the generated image is then digitallytransmitted to other electronic component for further processing.

The driving device 12 can have auto focusing functionality, anddifferent driving configurations can be through the usages of voice coilmotors (VCM), micro electro-mechanical systems (MEMS), piezoelectricsystems, or shape memory alloy materials. The driving device 12 isfavorable for obtaining a better imaging position of the lens unit 11,so that a clear image of the imaged object can be captured by the lensunit 11 with different object distances. The image sensor 13 (forexample, CCD or CMOS), which can feature with high photosensitivity andlow noise, is disposed on the image surface of the photographing lensassembly to provide higher image quality.

The image stabilizer 14, such as an accelerometer, a gyroscope and aHall Effect sensor, is configured to work with the driving device 12 toprovide optical image stabilization (OIS). The driving device 12 workingwith the image stabilizer 14 is favorable for compensating for pan andtilt of the lens unit 11 to reduce blurring associated with motionduring exposure. In some cases, the compensation can be provided byelectronic image stabilization (EIS) with image processing software,thereby improving the image quality while in motion or low-lightconditions.

12th Embodiment

FIG. 22 is one perspective view of an electronic device according to the12th embodiment of the present disclosure. FIG. 23 is anotherperspective view of the electronic device in FIG. 22. FIG. 24 is a blockdiagram of the electronic device in FIG. 22. In this embodiment, anelectronic device 20 is a smartphone including the image capturing unit10 disclosed in the 11th embodiment, a flash module 21, a focus assistmodule 22, an image signal processor 23, an user interface 24 and animage software processor 25. In this embodiment, the electronic device20 includes one image capturing unit 10, but the disclosure is notlimited thereto. In some cases, the electronic device 20 can includemultiple image capturing units 10, or the electronic device 20 furtherincludes another different image capturing unit.

When a user captures the images of an object 26 through the userinterface 24, the light rays converge in the image capturing unit 10 togenerate an image, and the flash module 21 is activated for lightsupplement. The focus assist module 22 detects the object distance ofthe imaged object 26 to achieve fast auto focusing. The image signalprocessor 23 is configured to optimize the captured image to improve theimage quality. The light beam emitted from the focus assist module 22can be either conventional infrared or laser. The user interface 24 canbe a touch screen or a physical button. The user is able to interactwith the user interface 24 and the image software processor 25 havingmultiple functions to capture images and complete image processing.

The smartphone in this embodiment is only exemplary for showing theimage capturing unit 10 of the present disclosure installed in anelectronic device, and the present disclosure is not limited thereto.The image capturing unit 10 can be optionally applied to optical systemswith a movable focus. Furthermore, the photographing lens assembly ofthe image capturing unit 10 features good capability in aberrationcorrections and high image quality, and can be applied to 3D(three-dimensional) image capturing applications, in products such asdigital cameras, mobile devices, digital tablets, smart televisions,network surveillance devices, dashboard cameras, vehicle backup cameras,multi-camera devices, motion sensing input devices, wearable devices andother electronic imaging devices.

The foregoing description, for the purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTABLES 1-20 show different data of the different embodiments; however,the data of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. A photographing lens assembly comprising six lenselements, the six lens elements being, in order from an object side toan image side: a first lens element with negative refractive powerhaving an object-side surface being concave in a paraxial regionthereof, wherein the object-side surface of the first lens element hasat least one convex critical point in an off-axis region thereof; asecond lens element; a third lens element having an image-side surfacebeing convex in a paraxial region thereof; a fourth lens element havingpositive refractive power; a fifth lens element with negative refractivepower having an object-side surface being concave in a paraxial regionthereof and an image-side surface being convex in a paraxial regionthereof; and a sixth lens element having an image-side surface beingconcave in a paraxial region thereof, wherein the image-side surface ofthe sixth lens element has at least one convex critical point in anoff-axis region thereof, and an object-side surface and the image-sidesurface of the sixth lens element are both aspheric; wherein a curvatureradius of the object-side surface of the first lens element is R1, acurvature radius of an image-side surface of the first lens element isR2, a central thickness of the sixth lens element is CT6, an axialdistance between the fifth lens element and the sixth lens element isT56, an axial distance between the first lens element and the secondlens element is T12, an axial distance between the second lens elementand the third lens element is T23, and the following conditions aresatisfied:|R1/R2|<5.0;1.60<CT6/T56<100; and0.68<T12/T23<1.60.
 2. The photographing lens assembly of claim 1,wherein a maximum field of view of the photographing lens assembly isFOV, an f-number of the photographing lens assembly is FNo, and thefollowing conditions are satisfied:100 [deg.]<FOV<200 [deg.]; and1.25<FNo<3.0.
 3. The photographing lens assembly of claim 1, wherein afocal length of the fourth lens element is f4, a focal length of thefifth lens element is f5, and the following condition is satisfied:|f5/f4|<1.50.
 4. The photographing lens assembly of claim 1, wherein thesecond lens element has an object-side surface being convex in aparaxial region thereof and an image-side surface being concave in aparaxial region thereof.
 5. The photographing lens assembly of claim 1,wherein the central thickness of the sixth lens element is CT6, theaxial distance between the fifth lens element and the sixth lens elementis T56, and the following condition is satisfied:2.0<CT6/T56<100.
 6. The photographing lens assembly of claim 1, whereina focal length of the first lens element is f1, a focal length of thesixth lens element is f6, and the following condition is satisfied:|f1/f6|<1.0.
 7. The photographing lens assembly of claim 1, wherein amaximum effective radius of the object-side surface of the first lenselement is Y1R1, a maximum effective radius of the image-side surface ofthe sixth lens element is Y6R2, and the following condition issatisfied:0.60<Y1R1/Y6R2<1.0.
 8. The photographing lens assembly of claim 1,wherein each of at least two lens elements among the second through thefifth lens elements has at least one critical point in an off-axisregion thereof.
 9. The photographing lens assembly of claim 1, wherein acurvature radius of an object-side surface of the third lens element isR5, a curvature radius of the image-side surface of the third lenselement is R6, and the following condition is satisfied:0.25<(R5+R6)/(R5−R6)<1.50.
 10. The photographing lens assembly of claim1, wherein the sixth lens element has positive refractive power, and theobject-side surface of the sixth lens element is convex in a paraxialregion thereof.
 11. The photographing lens assembly of claim 1, whereina focal length of the photographing lens assembly is f, a curvatureradius of an object-side surface of the second lens element is R3, acurvature radius of an image-side surface of the second lens element isR4, and the following condition is satisfied:1.5<(f/R3)+(f/R4)<5.0.
 12. The photographing lens assembly of claim 1,wherein the axial distance between the first lens element and the secondlens element is T12, the axial distance between the second lens elementand the third lens element is T23, an axial distance between the thirdlens element and the fourth lens element is T34, an axial distancebetween the fourth lens element and the fifth lens element is T45, theaxial distance between the fifth lens element and the sixth lens elementis T56, and the following condition is satisfied:0.35<(T12+T56)/(T23+T34+T45)<1.75.
 13. The photographing lens assemblyof claim 1, wherein a focal length of the photographing lens assembly isf, the central thickness of the sixth lens element is CT6, and thefollowing condition is satisfied:f/CT6<3.60.
 14. The photographing lens assembly of claim 1, wherein adisplacement in parallel with an optical axis from an axial vertex ofthe image-side surface of the fifth lens element to a maximum effectiveradius position of the image-side surface of the fifth lens element isSag52, a central thickness of the fifth lens element is CT5, and thefollowing condition is satisfied:−0.75<Sag52/CT5<0.25.
 15. The photographing lens assembly of claim 1,further comprising an aperture stop disposed between the second lenselement and the third lens element.
 16. The photographing lens assemblyof claim 1, wherein an axial distance between the object-side surface ofthe first lens element and an image surface is TL, the curvature radiusof the object-side surface of the first lens element is R1, and thefollowing condition is satisfied:−5.0<TL/R1<−0.50.
 17. The photographing lens assembly of claim 1,wherein a focal length of the photographing lens assembly is f, a focallength of the second lens element is f2, a focal length of the sixthlens element is f6, a focal length of the i-th lens element is fi, andthe following condition is satisfied:|f/f2|+|f/6|<|f/fi|, wherein i=1, 3, 4,
 5. 18. The photographing lensassembly of claim 1, wherein the second lens element has positiverefractive power.
 19. An image capturing unit, comprising: thephotographing lens assembly of claim 1; and an image sensor disposed onan image surface of the photographing lens assembly.
 20. An electronicdevice, comprising: the image capturing unit of claim 19.